update vendor

Signed-off-by: Jess Frazelle <acidburn@microsoft.com>

vendor/github.com/docker/distribution/script/validate/dco

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+
+set -eu -o pipefail
+
+if ! command -v git-validation; then
+    >&2 echo "ERROR: git-validation not found. Install with:"
+    >&2 echo "    go get -u github.com/vbatts/git-validation"
+    exit 1
+fi
+
+verbosity="${DCO_VERBOSITY--v}"
+GIT_CHECK_EXCLUDE="./vendor:./script/validate/template" git-validation "$verbosity" -run DCO,short-subject,dangling-whitespace

vendor/github.com/docker/distribution/script/validate/vendor

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+
+set -eu -o pipefail
+
+rm -rf vendor/
+vndr |& grep -v -i clone
+
+DIFF_PATH="vendor/"
+DIFF=$(git status --porcelain -- "$DIFF_PATH")
+
+if [ "$DIFF" ]; then
+    echo
+    echo "These files were modified:"
+    echo
+    echo "$DIFF"
+    echo
+    exit 1
+else
+    echo "$DIFF_PATH is correct"
+fi